Subsoil-plow.



- Patented Dec. I6, I902. N. B. CASH.

SUBSUIL PLOW.

(Application filed Apr. 26, 1902.)

(No Model.)

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UNITED STATES PATENT OFFICE.

NOAH B. CASH, OF JACKSON COUNTY, GEORGIA.

SUBSOlL-PLOW.

SPECIFICATION forming part of Letters Patent No. 715,981, dated December 1 1 2- Application filed April 25,1902. Serial No. 104,667. (No model.)

To all whom, it may concern:

Be it known that I, NOAH B. CASH, a citizen of the United States, residing in the county of Jackson and State of Georgia, have invented a new and useful Subsoil-Plow, of which the following is a specification.

My invention is an improved subsoil-plow adapted for use in connection with an ordinary turning-plow; and it consists in the peculiar construction and combination of devices hereinafter fully set forth and claimed.

One object of my invention is to effect improvements in the construction of the subsoilplow foot, whereby the efliciency of the same is increased and friction is lessened between the same on the earth in which it runs, thereby lessening the draft.

A further object of my invention is to provide improved means whereby a subsoiler may be readily attached to and used in connection with an ordinary turning-plow and readily removed therefrom when desired.

In the accompanying drawings, Figure 1 is a side elevation of my improved subsoil-plow, showing the same attached to and adapted to be used in connection with an ordinary turning-plow. Fig. 2 is a top plan view of the same. Fig. 3 is a detail perspective view of my improved subsoil-plow. Fig. 4 is a detail top plan view of the subsoil-plow foot.

My improved subsoil-plow foot'l is substantially wedge-shaped longitudinally and has its front end broadened to form an entering point 2. The upper and lower sides 3 4 of the said point are flattened and converge forwardly to form the front cutting edge 5. In practice the subsoil-plow foot is about fourteen inches long and about an inch and a half wide and the broadened entering point thereof is about three inches wide.

The upper side 6 of thesubsoil-plow foot is arched longitudinally and the lower side 7 thereof is formed bya rentrant curve, whereby the said plow-foot is caused to bear only at its entering point and heel. This construction of the plow-foot renders the same exceedingly efficient as a subsoiler, and by having its lower side incurved the friction between the plow-foot and the soil in which it runs is very greatly reduced as compared with the subsoil-plows of common construction. The

sides of the subsoil-plow foot are also curved inwardly from a point near the center of the plow-foot to the corners of the entering point, and this construction also adds to the efficiency of the subsoil-plow and lessens the draft thereof.

At the rear end of the subsoil-plow foot is a standard 8. Within the scope of my invention the same may be attached to the plowfoot by any suitable means, and I do not limit myself in this particular. As here shown, the upper end of the said standard is attached bya clip 9 to a supplemental beam 10, which latter is detachably secured to the beam a of the turning plow and extends rearwardly therefrom, so that my subsoiler is disposed in rear of the turning-plow, and the height of the standard 8 is such that my subsoiler may be set to run at any desired depth in the soil below the turning-plow. Bolts 11 are here shown to detachably secure the supplemental beam to the plow-beam.

It will be understood that the supplemental beam, together with the subsoilplow foot which it carries, may be readily attached to the beam of an ordinary turning-plow and as readily removed therefrom.

While my detachable supplemental beam I and the standard which is adjustably secured thereto constitute a feature of my invention and are specifically claimed herein, I would have it understood that I do not restrict myself to theuse of my improved subsoil-plow foot in connection therewith. Neither do I desire to limit myself to the precise construction of the plow-foot hereinbefore described, as modifications may be made therein within the scope of the appended claims.

In Figs. 1 and 2 of the drawings I have shown my improved subsoiler attached to a turning plow for operation in connection therewith. I would have it understood, however, that my improved subsoiler may be used in connection with any form of plowstock and independently of a turning or other form of plow, and I do not limit myself in this particular.

Having thus described my invention, I claim- 1. A subsoil-plow foot wedge-shaped longitudinally and having its front end broadened to form an entering point, substantially as described.

2. A subsoil-plow foot wedge-shaped longitudinally and having its front end broadened to form an entering point, the upper and lower sides of said point being flattened and converging forwardly, substantially as described 3. A subsoil-plow foot having its upper side arched longitudinally and its lower side formed by a rentrant curve, whereby the said plow-foot bears only at its point and heel, substantially as described.

4. A subsoil-plow foot having its upper side arched longitudinally and its lower side formed by a rentrant curve, and having its front end broadened to form an entering point, substantially as described. 

